Is out of business due to high standards (6)
I believe the answer is:
ideals
'high standards' is the definition.
(I've seen this before)
'is out of business' is the wordplay.
'out of' indicates putting letters inside (some letters on the outside of others).
'business' becomes 'deal'.
'is' enclosing 'deal' is 'IDEALS'.
'due to' acts as a link.
(Other definitions for ideals that I've seen before include "Standards to be aimed at" , "Lofty aspirations for ladies" , "Ethics" , "High aspirations for ladies" , "Lofty aims for ladies" .)